Description of Business and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Jul. 31, 2020
Disaggregation of Revenue [Line Items]
Service revenues and vehicle sales:	$ 592,940	$ 554,424
Cumulative Translation Adjustment Summary [Roll Forward]
Cumulative loss on foreign currency translation, beginning balance	(121,088)	(132,529)	$ (132,529)
(Loss) Gain on foreign currency translation	(7,406)		11,441
Cumulative loss on foreign currency translation, ending balance	(128,494)		$ (121,088)
Service revenues
Disaggregation of Revenue [Line Items]
Service revenues and vehicle sales:	515,372	487,856
Vehicle sales
Disaggregation of Revenue [Line Items]
Service revenues and vehicle sales:	$ 77,568	$ 66,568